fix two bugs related to textype_t pointed out by Lee Salzman, both
[divverent/darkplaces.git] / gl_textures.c
1
2 #include "quakedef.h"
3 #include "image.h"
4 #include "jpeg.h"
5 #include "image_png.h"
6
7 cvar_t gl_max_size = {CVAR_SAVE, "gl_max_size", "2048", "maximum allowed texture size, can be used to reduce video memory usage, note: this is automatically reduced to match video card capabilities (such as 256 on 3Dfx cards before Voodoo4/5)"};
8 cvar_t gl_picmip = {CVAR_SAVE, "gl_picmip", "0", "reduces resolution of textures by powers of 2, for example 1 will halve width/height, reducing texture memory usage by 75%"};
9 cvar_t r_lerpimages = {CVAR_SAVE, "r_lerpimages", "1", "bilinear filters images when scaling them up to power of 2 size (mode 1), looks better than glquake (mode 0)"};
10 cvar_t r_precachetextures = {CVAR_SAVE, "r_precachetextures", "1", "0 = never upload textures until used, 1 = upload most textures before use (exceptions: rarely used skin colormap layers), 2 = upload all textures before use (can increase texture memory usage significantly)"};
11 cvar_t gl_texture_anisotropy = {CVAR_SAVE, "gl_texture_anisotropy", "1", "anisotropic filtering quality (if supported by hardware), 1 sample (no anisotropy) and 8 sample (8 tap anisotropy) are recommended values"};
12 cvar_t gl_texturecompression = {CVAR_SAVE, "gl_texturecompression", "0", "whether to compress textures, a value of 0 disables compression (even if the individual cvars are 1), 1 enables fast (low quality) compression at startup, 2 enables slow (high quality) compression at startup"};
13 cvar_t gl_texturecompression_color = {CVAR_SAVE, "gl_texturecompression_color", "1", "whether to compress colormap (diffuse) textures"};
14 cvar_t gl_texturecompression_normal = {CVAR_SAVE, "gl_texturecompression_normal", "0", "whether to compress normalmap (normalmap) textures"};
15 cvar_t gl_texturecompression_gloss = {CVAR_SAVE, "gl_texturecompression_gloss", "1", "whether to compress glossmap (specular) textures"};
16 cvar_t gl_texturecompression_glow = {CVAR_SAVE, "gl_texturecompression_glow", "1", "whether to compress glowmap (luma) textures"};
17 cvar_t gl_texturecompression_2d = {CVAR_SAVE, "gl_texturecompression_2d", "0", "whether to compress 2d (hud/menu) textures other than the font"};
18 cvar_t gl_texturecompression_q3bsplightmaps = {CVAR_SAVE, "gl_texturecompression_q3bsplightmaps", "0", "whether to compress lightmaps in q3bsp format levels"};
19 cvar_t gl_texturecompression_q3bspdeluxemaps = {CVAR_SAVE, "gl_texturecompression_q3bspdeluxemaps", "0", "whether to compress deluxemaps in q3bsp format levels (only levels compiled with q3map2 -deluxe have these)"};
20 cvar_t gl_texturecompression_sky = {CVAR_SAVE, "gl_texturecompression_sky", "0", "whether to compress sky textures"};
21 cvar_t gl_texturecompression_lightcubemaps = {CVAR_SAVE, "gl_texturecompression_lightcubemaps", "1", "whether to compress light cubemaps (spotlights and other light projection images)"};
22
23 int             gl_filter_min = GL_LINEAR_MIPMAP_LINEAR;
24 int             gl_filter_mag = GL_LINEAR;
25
26
27 static mempool_t *texturemempool;
28
29 // note: this must not conflict with TEXF_ flags in r_textures.h
30 // cleared when a texture is uploaded
31 #define GLTEXF_UPLOAD           0x00010000
32 // bitmask for mismatch checking
33 #define GLTEXF_IMPORTANTBITS (0)
34 // set when image is uploaded and freed
35 #define GLTEXF_DESTROYED        0x00040000
36 // dynamic texture (treat texnum == 0 differently)
37 #define GLTEXF_DYNAMIC          0x00080000
38
39 typedef struct textypeinfo_s
40 {
41         textype_t textype;
42         int inputbytesperpixel;
43         int internalbytesperpixel;
44         float glinternalbytesperpixel;
45         int glformat;
46         int glinternalformat;
47         int gltype;
48 }
49 textypeinfo_t;
50
51 static textypeinfo_t textype_palette                = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_BGRA   , 3, GL_UNSIGNED_BYTE};
52 static textypeinfo_t textype_palette_alpha          = {TEXTYPE_PALETTE, 1, 4, 4.0f, GL_BGRA   , 4, GL_UNSIGNED_BYTE};
53 static textypeinfo_t textype_palette_compress       = {TEXTYPE_PALETTE, 1, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
54 static textypeinfo_t textype_palette_alpha_compress = {TEXTYPE_PALETTE, 1, 4, 1.0f, GL_BGRA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
55 static textypeinfo_t textype_rgba                   = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 3, GL_UNSIGNED_BYTE};
56 static textypeinfo_t textype_rgba_alpha             = {TEXTYPE_RGBA   , 4, 4, 4.0f, GL_RGBA   , 4, GL_UNSIGNED_BYTE};
57 static textypeinfo_t textype_rgba_compress          = {TEXTYPE_RGBA   , 4, 4, 0.5f, GL_RGBA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
58 static textypeinfo_t textype_rgba_alpha_compress    = {TEXTYPE_RGBA   , 4, 4, 1.0f, GL_RGBA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
59 static textypeinfo_t textype_bgra                   = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 3, GL_UNSIGNED_BYTE};
60 static textypeinfo_t textype_bgra_alpha             = {TEXTYPE_BGRA   , 4, 4, 4.0f, GL_BGRA   , 4, GL_UNSIGNED_BYTE};
61 static textypeinfo_t textype_bgra_compress          = {TEXTYPE_BGRA   , 4, 4, 0.5f, GL_BGRA   , GL_COMPRESSED_RGB_ARB, GL_UNSIGNED_BYTE};
62 static textypeinfo_t textype_bgra_alpha_compress    = {TEXTYPE_BGRA   , 4, 4, 1.0f, GL_BGRA   , GL_COMPRESSED_RGBA_ARB, GL_UNSIGNED_BYTE};
63 static textypeinfo_t textype_shadowmap              = {TEXTYPE_SHADOWMAP,4,4, 4.0f, GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT24_ARB, GL_UNSIGNED_INT};
64
65 typedef enum gltexturetype_e
66 {
67         GLTEXTURETYPE_1D,
68         GLTEXTURETYPE_2D,
69         GLTEXTURETYPE_3D,
70         GLTEXTURETYPE_CUBEMAP,
71         GLTEXTURETYPE_RECTANGLE,
72         GLTEXTURETYPE_TOTAL
73 }
74 gltexturetype_t;
75
76 static int gltexturetypeenums[GLTEXTURETYPE_TOTAL] = {GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_RECTANGLE_ARB};
77 static int gltexturetypebindingenums[GLTEXTURETYPE_TOTAL] = {GL_TEXTURE_BINDING_1D, GL_TEXTURE_BINDING_2D, GL_TEXTURE_BINDING_3D, GL_TEXTURE_BINDING_CUBE_MAP_ARB, GL_TEXTURE_BINDING_RECTANGLE_ARB};
78 static int gltexturetypedimensions[GLTEXTURETYPE_TOTAL] = {1, 2, 3, 2, 2};
79 static int cubemapside[6] =
80 {
81         GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB,
82         GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB,
83         GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB,
84         GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB,
85         GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB,
86         GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
87 };
88
89 typedef struct gltexture_s
90 {
91         // this field is exposed to the R_GetTexture macro, for speed reasons
92         // (must be identical in rtexture_t)
93         int texnum; // GL texture slot number
94
95         // dynamic texture stuff [11/22/2007 Black]
96         // used to hold the texture number of dirty textures   
97         int dirtytexnum;
98         updatecallback_t updatecallback;
99         void *updatacallback_data;
100         // --- [11/22/2007 Black]
101
102         // pointer to texturepool (check this to see if the texture is allocated)
103         struct gltexturepool_s *pool;
104         // pointer to next texture in texturepool chain
105         struct gltexture_s *chain;
106         // name of the texture (this might be removed someday), no duplicates
107         char identifier[MAX_QPATH + 32];
108         // original data size in *inputtexels
109         int inputwidth, inputheight, inputdepth;
110         // copy of the original texture(s) supplied to the upload function, for
111         // delayed uploads (non-precached)
112         unsigned char *inputtexels;
113         // original data size in *inputtexels
114         int inputdatasize;
115         // flags supplied to the LoadTexture function
116         // (might be altered to remove TEXF_ALPHA), and GLTEXF_ private flags
117         int flags;
118         // pointer to one of the textype_ structs
119         textypeinfo_t *textype;
120         // one of the GLTEXTURETYPE_ values
121         int texturetype;
122         // palette if the texture is TEXTYPE_PALETTE
123         const unsigned int *palette;
124         // actual stored texture size after gl_picmip and gl_max_size are applied
125         // (power of 2 if gl_support_arb_texture_non_power_of_two is not supported)
126         int tilewidth, tileheight, tiledepth;
127         // 1 or 6 depending on texturetype
128         int sides;
129         // bytes per pixel
130         int bytesperpixel;
131         // GL_RGB or GL_RGBA or GL_DEPTH_COMPONENT
132         int glformat;
133         // 3 or 4
134         int glinternalformat;
135         // GL_UNSIGNED_BYTE or GL_UNSIGNED_INT or GL_UNSIGNED_SHORT or GL_FLOAT
136         int gltype;
137 }
138 gltexture_t;
139
140 #define TEXTUREPOOL_SENTINEL 0xC0DEDBAD
141
142 typedef struct gltexturepool_s
143 {
144         unsigned int sentinel;
145         struct gltexture_s *gltchain;
146         struct gltexturepool_s *next;
147 }
148 gltexturepool_t;
149
150 static gltexturepool_t *gltexturepoolchain = NULL;
151
152 static unsigned char *resizebuffer = NULL, *colorconvertbuffer;
153 static int resizebuffersize = 0;
154 static const unsigned char *texturebuffer;
155 static int texturebuffersize = 0;
156
157 static textypeinfo_t *R_GetTexTypeInfo(textype_t textype, int flags)
158 {
159         if ((flags & TEXF_COMPRESS) && gl_texturecompression.integer >= 1 && gl_support_texture_compression)
160         {
161                 if (flags & TEXF_ALPHA)
162                 {
163                         switch(textype)
164                         {
165                         case TEXTYPE_PALETTE:
166                                 return &textype_palette_alpha_compress;
167                         case TEXTYPE_RGBA:
168                                 return &textype_rgba_alpha_compress;
169                         case TEXTYPE_BGRA:
170                                 return &textype_bgra_alpha_compress;
171                         default:
172                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
173                                 return NULL;
174                         }
175                 }
176                 else
177                 {
178                         switch(textype)
179                         {
180                         case TEXTYPE_PALETTE:
181                                 return &textype_palette_compress;
182                         case TEXTYPE_RGBA:
183                                 return &textype_rgba_compress;
184                         case TEXTYPE_BGRA:
185                                 return &textype_bgra_compress;
186                         default:
187                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
188                                 return NULL;
189                         }
190                 }
191         }
192         else
193         {
194                 if (flags & TEXF_ALPHA)
195                 {
196                         switch(textype)
197                         {
198                         case TEXTYPE_PALETTE:
199                                 return &textype_palette_alpha;
200                         case TEXTYPE_RGBA:
201                                 return &textype_rgba_alpha;
202                         case TEXTYPE_BGRA:
203                                 return &textype_bgra_alpha;
204                         default:
205                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
206                                 return NULL;
207                         }
208                 }
209                 else
210                 {
211                         switch(textype)
212                         {
213                         case TEXTYPE_PALETTE:
214                                 return &textype_palette;
215                         case TEXTYPE_RGBA:
216                                 return &textype_rgba;
217                         case TEXTYPE_BGRA:
218                                 return &textype_bgra;
219                         case TEXTYPE_SHADOWMAP:
220                                 return &textype_shadowmap;
221                         default:
222                                 Host_Error("R_GetTexTypeInfo: unknown texture format");
223                                 return NULL;
224                         }
225                 }
226         }
227         return NULL; // this line only to hush compiler warnings
228 }
229
230 // dynamic texture code [11/22/2007 Black]
231 void R_MarkDirtyTexture(rtexture_t *rt) {
232         gltexture_t *glt = (gltexture_t*) rt;
233         if( !glt ) {
234                 return;
235         }
236
237         // dont do anything if the texture is already dirty (and make sure this *is* a dynamic texture after all!)
238         if( !glt->dirtytexnum && glt->flags & GLTEXF_DYNAMIC ) {
239                 glt->dirtytexnum = glt->texnum;
240                 // mark it as dirty, so R_RealGetTexture gets called
241                 glt->texnum = 0;
242         }
243 }
244
245 void R_MakeTextureDynamic(rtexture_t *rt, updatecallback_t updatecallback, void *data) {
246         gltexture_t *glt = (gltexture_t*) rt;
247         if( !glt ) {
248                 return;
249         }
250
251         glt->flags |= GLTEXF_DYNAMIC;
252         glt->updatecallback = updatecallback;
253         glt->updatacallback_data = data;
254         glt->dirtytexnum = 0;
255 }
256
257 static void R_UpdateDynamicTexture(gltexture_t *glt) {
258         glt->texnum = glt->dirtytexnum;
259         // reset dirtytexnum again (not dirty anymore)
260         glt->dirtytexnum = 0;
261         // TODO: now assert that t->texnum != 0 ?
262         if( glt->updatecallback ) {
263                 glt->updatecallback( (rtexture_t*) glt, glt->updatacallback_data );
264         }
265 }
266
267 static void R_UploadTexture(gltexture_t *t);
268
269 static void R_PrecacheTexture(gltexture_t *glt)
270 {
271         int precache;
272         precache = false;
273         if (glt->flags & TEXF_ALWAYSPRECACHE)
274                 precache = true;
275         else if (r_precachetextures.integer >= 2)
276                 precache = true;
277         else if (r_precachetextures.integer >= 1)
278                 if (glt->flags & TEXF_PRECACHE)
279                         precache = true;
280
281         if (precache)
282                 R_UploadTexture(glt);
283 }
284
285 int R_RealGetTexture(rtexture_t *rt)
286 {
287         if (rt)
288         {
289                 gltexture_t *glt;
290                 glt = (gltexture_t *)rt;
291                 if (glt->flags & GLTEXF_DYNAMIC)
292                         R_UpdateDynamicTexture(glt);
293                 if (glt->flags & GLTEXF_UPLOAD)
294                         R_UploadTexture(glt);
295
296                 return glt->texnum;
297         }
298         else
299                 return 0;
300 }
301
302 void R_PurgeTexture(rtexture_t *rt)
303 {
304         if(rt && !(((gltexture_t*) rt)->flags & TEXF_PERSISTENT)) {
305                 R_FreeTexture(rt);
306         }
307 }
308
309 void R_FreeTexture(rtexture_t *rt)
310 {
311         gltexture_t *glt, **gltpointer;
312
313         glt = (gltexture_t *)rt;
314         if (glt == NULL)
315                 Host_Error("R_FreeTexture: texture == NULL");
316
317         for (gltpointer = &glt->pool->gltchain;*gltpointer && *gltpointer != glt;gltpointer = &(*gltpointer)->chain);
318         if (*gltpointer == glt)
319                 *gltpointer = glt->chain;
320         else
321                 Host_Error("R_FreeTexture: texture \"%s\" not linked in pool", glt->identifier);
322
323         if (!(glt->flags & GLTEXF_UPLOAD))
324         {
325                 CHECKGLERROR
326                 qglDeleteTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
327         }
328
329         if (glt->inputtexels)
330                 Mem_Free(glt->inputtexels);
331         Mem_Free(glt);
332 }
333
334 rtexturepool_t *R_AllocTexturePool(void)
335 {
336         gltexturepool_t *pool;
337         if (texturemempool == NULL)
338                 return NULL;
339         pool = (gltexturepool_t *)Mem_Alloc(texturemempool, sizeof(gltexturepool_t));
340         if (pool == NULL)
341                 return NULL;
342         pool->next = gltexturepoolchain;
343         gltexturepoolchain = pool;
344         pool->sentinel = TEXTUREPOOL_SENTINEL;
345         return (rtexturepool_t *)pool;
346 }
347
348 void R_FreeTexturePool(rtexturepool_t **rtexturepool)
349 {
350         gltexturepool_t *pool, **poolpointer;
351         if (rtexturepool == NULL)
352                 return;
353         if (*rtexturepool == NULL)
354                 return;
355         pool = (gltexturepool_t *)(*rtexturepool);
356         *rtexturepool = NULL;
357         if (pool->sentinel != TEXTUREPOOL_SENTINEL)
358                 Host_Error("R_FreeTexturePool: pool already freed");
359         for (poolpointer = &gltexturepoolchain;*poolpointer && *poolpointer != pool;poolpointer = &(*poolpointer)->next);
360         if (*poolpointer == pool)
361                 *poolpointer = pool->next;
362         else
363                 Host_Error("R_FreeTexturePool: pool not linked");
364         while (pool->gltchain)
365                 R_FreeTexture((rtexture_t *)pool->gltchain);
366         Mem_Free(pool);
367 }
368
369
370 typedef struct glmode_s
371 {
372         char *name;
373         int minification, magnification;
374 }
375 glmode_t;
376
377 static glmode_t modes[6] =
378 {
379         {"GL_NEAREST", GL_NEAREST, GL_NEAREST},
380         {"GL_LINEAR", GL_LINEAR, GL_LINEAR},
381         {"GL_NEAREST_MIPMAP_NEAREST", GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST},
382         {"GL_LINEAR_MIPMAP_NEAREST", GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR},
383         {"GL_NEAREST_MIPMAP_LINEAR", GL_NEAREST_MIPMAP_LINEAR, GL_NEAREST},
384         {"GL_LINEAR_MIPMAP_LINEAR", GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR}
385 };
386
387 static void GL_TextureMode_f (void)
388 {
389         int i;
390         GLint oldbindtexnum;
391         gltexture_t *glt;
392         gltexturepool_t *pool;
393
394         if (Cmd_Argc() == 1)
395         {
396                 for (i = 0;i < 6;i++)
397                 {
398                         if (gl_filter_min == modes[i].minification)
399                         {
400                                 Con_Printf("%s\n", modes[i].name);
401                                 return;
402                         }
403                 }
404                 Con_Print("current filter is unknown???\n");
405                 return;
406         }
407
408         for (i = 0;i < 6;i++)
409                 if (!strcasecmp (modes[i].name, Cmd_Argv(1) ) )
410                         break;
411         if (i == 6)
412         {
413                 Con_Print("bad filter name\n");
414                 return;
415         }
416
417         gl_filter_min = modes[i].minification;
418         gl_filter_mag = modes[i].magnification;
419
420         // change all the existing mipmap texture objects
421         // FIXME: force renderer(/client/something?) restart instead?
422         CHECKGLERROR
423         for (pool = gltexturepoolchain;pool;pool = pool->next)
424         {
425                 for (glt = pool->gltchain;glt;glt = glt->chain)
426                 {
427                         // only update already uploaded images
428                         if (!(glt->flags & (GLTEXF_UPLOAD | TEXF_FORCENEAREST | TEXF_FORCELINEAR)))
429                         {
430                                 qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
431                                 qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
432                                 if (glt->flags & TEXF_MIPMAP)
433                                 {
434                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
435                                 }
436                                 else
437                                 {
438                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
439                                 }
440                                 qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
441                                 qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
442                         }
443                 }
444         }
445 }
446
447 static void GL_Texture_CalcImageSize(int texturetype, int flags, int inwidth, int inheight, int indepth, int *outwidth, int *outheight, int *outdepth)
448 {
449         int picmip = 0, maxsize = 0, width2 = 1, height2 = 1, depth2 = 1;
450
451         if (gl_max_size.integer > gl_max_texture_size)
452                 Cvar_SetValue("gl_max_size", gl_max_texture_size);
453
454         switch (texturetype)
455         {
456         default:
457         case GLTEXTURETYPE_1D:
458         case GLTEXTURETYPE_2D:
459                 maxsize = gl_max_texture_size;
460                 break;
461         case GLTEXTURETYPE_3D:
462                 maxsize = gl_max_3d_texture_size;
463                 break;
464         case GLTEXTURETYPE_CUBEMAP:
465                 maxsize = gl_max_cube_map_texture_size;
466                 break;
467         }
468
469         if (flags & TEXF_PICMIP)
470         {
471                 maxsize = min(maxsize, gl_max_size.integer);
472                 picmip = gl_picmip.integer;
473         }
474
475         if (outwidth)
476         {
477                 if (gl_support_arb_texture_non_power_of_two)
478                         width2 = min(inwidth >> picmip, maxsize);
479                 else
480                 {
481                         for (width2 = 1;width2 < inwidth;width2 <<= 1);
482                         for (width2 >>= picmip;width2 > maxsize;width2 >>= 1);
483                 }
484                 *outwidth = max(1, width2);
485         }
486         if (outheight)
487         {
488                 if (gl_support_arb_texture_non_power_of_two)
489                         height2 = min(inheight >> picmip, maxsize);
490                 else
491                 {
492                         for (height2 = 1;height2 < inheight;height2 <<= 1);
493                         for (height2 >>= picmip;height2 > maxsize;height2 >>= 1);
494                 }
495                 *outheight = max(1, height2);
496         }
497         if (outdepth)
498         {
499                 if (gl_support_arb_texture_non_power_of_two)
500                         depth2 = min(indepth >> picmip, maxsize);
501                 else
502                 {
503                         for (depth2 = 1;depth2 < indepth;depth2 <<= 1);
504                         for (depth2 >>= picmip;depth2 > maxsize;depth2 >>= 1);
505                 }
506                 *outdepth = max(1, depth2);
507         }
508 }
509
510
511 static int R_CalcTexelDataSize (gltexture_t *glt)
512 {
513         int width2, height2, depth2, size;
514
515         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &width2, &height2, &depth2);
516
517         size = width2 * height2 * depth2;
518
519         if (glt->flags & TEXF_MIPMAP)
520         {
521                 while (width2 > 1 || height2 > 1 || depth2 > 1)
522                 {
523                         if (width2 > 1)
524                                 width2 >>= 1;
525                         if (height2 > 1)
526                                 height2 >>= 1;
527                         if (depth2 > 1)
528                                 depth2 >>= 1;
529                         size += width2 * height2 * depth2;
530                 }
531         }
532
533         return (int)(size * glt->textype->glinternalbytesperpixel) * glt->sides;
534 }
535
536 void R_TextureStats_Print(qboolean printeach, qboolean printpool, qboolean printtotal)
537 {
538         int glsize;
539         int isloaded;
540         int pooltotal = 0, pooltotalt = 0, pooltotalp = 0, poolloaded = 0, poolloadedt = 0, poolloadedp = 0;
541         int sumtotal = 0, sumtotalt = 0, sumtotalp = 0, sumloaded = 0, sumloadedt = 0, sumloadedp = 0;
542         gltexture_t *glt;
543         gltexturepool_t *pool;
544         if (printeach)
545                 Con_Print("glsize input loaded mip alpha name\n");
546         for (pool = gltexturepoolchain;pool;pool = pool->next)
547         {
548                 pooltotal = 0;
549                 pooltotalt = 0;
550                 pooltotalp = 0;
551                 poolloaded = 0;
552                 poolloadedt = 0;
553                 poolloadedp = 0;
554                 for (glt = pool->gltchain;glt;glt = glt->chain)
555                 {
556                         glsize = R_CalcTexelDataSize(glt);
557                         isloaded = !(glt->flags & GLTEXF_UPLOAD);
558                         pooltotal++;
559                         pooltotalt += glsize;
560                         pooltotalp += glt->inputdatasize;
561                         if (isloaded)
562                         {
563                                 poolloaded++;
564                                 poolloadedt += glsize;
565                                 poolloadedp += glt->inputdatasize;
566                         }
567                         if (printeach)
568                                 Con_Printf("%c%4i%c%c%4i%c %s %s %s %s\n", isloaded ? '[' : ' ', (glsize + 1023) / 1024, isloaded ? ']' : ' ', glt->inputtexels ? '[' : ' ', (glt->inputdatasize + 1023) / 1024, glt->inputtexels ? ']' : ' ', isloaded ? "loaded" : "      ", (glt->flags & TEXF_MIPMAP) ? "mip" : "   ", (glt->flags & TEXF_ALPHA) ? "alpha" : "     ", glt->identifier);
569                 }
570                 if (printpool)
571                         Con_Printf("texturepool %10p total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", (void *)pool, pooltotal, pooltotalt / 1048576.0, pooltotalp / 1048576.0, poolloaded, poolloadedt / 1048576.0, poolloadedp / 1048576.0, pooltotal - poolloaded, (pooltotalt - poolloadedt) / 1048576.0, (pooltotalp - poolloadedp) / 1048576.0);
572                 sumtotal += pooltotal;
573                 sumtotalt += pooltotalt;
574                 sumtotalp += pooltotalp;
575                 sumloaded += poolloaded;
576                 sumloadedt += poolloadedt;
577                 sumloadedp += poolloadedp;
578         }
579         if (printtotal)
580                 Con_Printf("textures total: %i (%.3fMB, %.3fMB original), uploaded %i (%.3fMB, %.3fMB original), upload on demand %i (%.3fMB, %.3fMB original)\n", sumtotal, sumtotalt / 1048576.0, sumtotalp / 1048576.0, sumloaded, sumloadedt / 1048576.0, sumloadedp / 1048576.0, sumtotal - sumloaded, (sumtotalt - sumloadedt) / 1048576.0, (sumtotalp - sumloadedp) / 1048576.0);
581 }
582
583 static void R_TextureStats_f(void)
584 {
585         R_TextureStats_Print(true, true, true);
586 }
587
588 static void r_textures_start(void)
589 {
590         // LordHavoc: allow any alignment
591         CHECKGLERROR
592         qglPixelStorei(GL_UNPACK_ALIGNMENT, 1);CHECKGLERROR
593         qglPixelStorei(GL_PACK_ALIGNMENT, 1);CHECKGLERROR
594
595         texturemempool = Mem_AllocPool("texture management", 0, NULL);
596
597         // Disable JPEG screenshots if the DLL isn't loaded
598         if (! JPEG_OpenLibrary ())
599                 Cvar_SetValueQuick (&scr_screenshot_jpeg, 0);
600         // TODO: support png screenshots?
601         PNG_OpenLibrary ();
602 }
603
604 static void r_textures_shutdown(void)
605 {
606         rtexturepool_t *temp;
607
608         JPEG_CloseLibrary ();
609
610         while(gltexturepoolchain)
611         {
612                 temp = (rtexturepool_t *) gltexturepoolchain;
613                 R_FreeTexturePool(&temp);
614         }
615
616         resizebuffersize = 0;
617         texturebuffersize = 0;
618         resizebuffer = NULL;
619         colorconvertbuffer = NULL;
620         texturebuffer = NULL;
621         Mem_FreePool(&texturemempool);
622 }
623
624 static void r_textures_newmap(void)
625 {
626 }
627
628 void R_Textures_Init (void)
629 {
630         Cmd_AddCommand("gl_texturemode", &GL_TextureMode_f, "set texture filtering mode (GL_NEAREST, GL_LINEAR, GL_LINEAR_MIPMAP_LINEAR, etc)");
631         Cmd_AddCommand("r_texturestats", R_TextureStats_f, "print information about all loaded textures and some statistics");
632         Cvar_RegisterVariable (&gl_max_size);
633         Cvar_RegisterVariable (&gl_picmip);
634         Cvar_RegisterVariable (&r_lerpimages);
635         Cvar_RegisterVariable (&r_precachetextures);
636         Cvar_RegisterVariable (&gl_texture_anisotropy);
637         Cvar_RegisterVariable (&gl_texturecompression);
638         Cvar_RegisterVariable (&gl_texturecompression_color);
639         Cvar_RegisterVariable (&gl_texturecompression_normal);
640         Cvar_RegisterVariable (&gl_texturecompression_gloss);
641         Cvar_RegisterVariable (&gl_texturecompression_glow);
642         Cvar_RegisterVariable (&gl_texturecompression_2d);
643         Cvar_RegisterVariable (&gl_texturecompression_q3bsplightmaps);
644         Cvar_RegisterVariable (&gl_texturecompression_q3bspdeluxemaps);
645         Cvar_RegisterVariable (&gl_texturecompression_sky);
646         Cvar_RegisterVariable (&gl_texturecompression_lightcubemaps);
647
648         R_RegisterModule("R_Textures", r_textures_start, r_textures_shutdown, r_textures_newmap);
649 }
650
651 void R_Textures_Frame (void)
652 {
653         static int old_aniso = 0;
654
655         // could do procedural texture animation here, if we keep track of which
656         // textures were accessed this frame...
657
658         // free the resize buffers
659         resizebuffersize = 0;
660         if (resizebuffer)
661         {
662                 Mem_Free(resizebuffer);
663                 resizebuffer = NULL;
664         }
665         if (colorconvertbuffer)
666         {
667                 Mem_Free(colorconvertbuffer);
668                 colorconvertbuffer = NULL;
669         }
670
671         if (old_aniso != gl_texture_anisotropy.integer)
672         {
673                 gltexture_t *glt;
674                 gltexturepool_t *pool;
675                 GLint oldbindtexnum;
676
677                 old_aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
678
679                 Cvar_SetValueQuick(&gl_texture_anisotropy, old_aniso);
680
681                 CHECKGLERROR
682                 for (pool = gltexturepoolchain;pool;pool = pool->next)
683                 {
684                         for (glt = pool->gltchain;glt;glt = glt->chain)
685                         {
686                                 // only update already uploaded images
687                                 if ((glt->flags & (GLTEXF_UPLOAD | TEXF_MIPMAP)) == TEXF_MIPMAP)
688                                 {
689                                         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
690
691                                         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
692                                         qglTexParameteri(gltexturetypeenums[glt->texturetype], GL_TEXTURE_MAX_ANISOTROPY_EXT, old_aniso);CHECKGLERROR
693
694                                         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
695                                 }
696                         }
697                 }
698         }
699 }
700
701 void R_MakeResizeBufferBigger(int size)
702 {
703         if (resizebuffersize < size)
704         {
705                 resizebuffersize = size;
706                 if (resizebuffer)
707                         Mem_Free(resizebuffer);
708                 if (colorconvertbuffer)
709                         Mem_Free(colorconvertbuffer);
710                 resizebuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
711                 colorconvertbuffer = (unsigned char *)Mem_Alloc(texturemempool, resizebuffersize);
712                 if (!resizebuffer || !colorconvertbuffer)
713                         Host_Error("R_Upload: out of memory");
714         }
715 }
716
717 static void GL_SetupTextureParameters(int flags, textype_t textype, int texturetype)
718 {
719         int textureenum = gltexturetypeenums[texturetype];
720         int wrapmode = ((flags & TEXF_CLAMP) && gl_support_clamptoedge) ? GL_CLAMP_TO_EDGE : GL_REPEAT;
721
722         CHECKGLERROR
723
724         if (gl_support_anisotropy && (flags & TEXF_MIPMAP))
725         {
726                 int aniso = bound(1, gl_texture_anisotropy.integer, gl_max_anisotropy);
727                 if (gl_texture_anisotropy.integer != aniso)
728                         Cvar_SetValueQuick(&gl_texture_anisotropy, aniso);
729                 qglTexParameteri(textureenum, GL_TEXTURE_MAX_ANISOTROPY_EXT, aniso);CHECKGLERROR
730         }
731         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_S, wrapmode);CHECKGLERROR
732         qglTexParameteri(textureenum, GL_TEXTURE_WRAP_T, wrapmode);CHECKGLERROR
733         if (gltexturetypedimensions[texturetype] >= 3)
734         {
735                 qglTexParameteri(textureenum, GL_TEXTURE_WRAP_R, wrapmode);CHECKGLERROR
736         }
737
738         CHECKGLERROR
739         if (flags & TEXF_FORCENEAREST)
740         {
741                 if (flags & TEXF_MIPMAP)
742                 {
743                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);CHECKGLERROR
744                 }
745                 else
746                 {
747                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_NEAREST);CHECKGLERROR
748                 }
749                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_NEAREST);CHECKGLERROR
750         }
751         else if (flags & TEXF_FORCELINEAR)
752         {
753                 if (flags & TEXF_MIPMAP)
754                 {
755                         if (gl_filter_min == GL_NEAREST_MIPMAP_LINEAR || gl_filter_min == GL_LINEAR_MIPMAP_LINEAR)
756                         {
757                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);CHECKGLERROR
758                         }
759                         else
760                         {
761                                 qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);CHECKGLERROR
762                         }
763                 }
764                 else
765                 {
766                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, GL_LINEAR);CHECKGLERROR
767                 }
768                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, GL_LINEAR);CHECKGLERROR
769         }
770         else
771         {
772                 if (flags & TEXF_MIPMAP)
773                 {
774                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_min);CHECKGLERROR
775                 }
776                 else
777                 {
778                         qglTexParameteri(textureenum, GL_TEXTURE_MIN_FILTER, gl_filter_mag);CHECKGLERROR
779                 }
780                 qglTexParameteri(textureenum, GL_TEXTURE_MAG_FILTER, gl_filter_mag);CHECKGLERROR
781         }
782
783         if (textype == TEXTYPE_SHADOWMAP)
784         {
785 #if 1
786                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);CHECKGLERROR
787                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);CHECKGLERROR
788                 qglTexParameteri(textureenum, GL_DEPTH_TEXTURE_MODE_ARB, GL_INTENSITY);CHECKGLERROR
789 #else
790                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);CHECKGLERROR
791                 qglTexParameteri(textureenum, GL_TEXTURE_COMPARE_FUNC_ARB, GL_ALWAYS);CHECKGLERROR
792                 qglTexParameteri(textureenum, GL_DEPTH_TEXTURE_MODE_ARB, GL_INTENSITY);CHECKGLERROR
793 #endif
794         }
795
796         CHECKGLERROR
797 }
798
799 static void R_Upload(gltexture_t *glt, const unsigned char *data, int fragx, int fragy, int fragz, int fragwidth, int fragheight, int fragdepth)
800 {
801         int i, mip, width, height, depth;
802         GLint oldbindtexnum;
803         const unsigned char *prevbuffer;
804         prevbuffer = data;
805
806         CHECKGLERROR
807
808         // we need to restore the texture binding after finishing the upload
809         qglGetIntegerv(gltexturetypebindingenums[glt->texturetype], &oldbindtexnum);CHECKGLERROR
810         qglBindTexture(gltexturetypeenums[glt->texturetype], glt->texnum);CHECKGLERROR
811
812         // these are rounded up versions of the size to do better resampling
813         if (gl_support_arb_texture_non_power_of_two || glt->texturetype == GLTEXTURETYPE_RECTANGLE)
814         {
815                 width = glt->inputwidth;
816                 height = glt->inputheight;
817                 depth = glt->inputdepth;
818         }
819         else
820         {
821                 for (width  = 1;width  < glt->inputwidth ;width  <<= 1);
822                 for (height = 1;height < glt->inputheight;height <<= 1);
823                 for (depth  = 1;depth  < glt->inputdepth ;depth  <<= 1);
824         }
825
826         R_MakeResizeBufferBigger(width * height * depth * glt->sides * glt->bytesperpixel);
827         R_MakeResizeBufferBigger(fragwidth * fragheight * fragdepth * glt->sides * glt->bytesperpixel);
828
829         if (prevbuffer == NULL)
830         {
831                 memset(resizebuffer, 0, fragwidth * fragheight * fragdepth * glt->bytesperpixel);
832                 prevbuffer = resizebuffer;
833         }
834         else if (glt->textype->textype == TEXTYPE_PALETTE)
835         {
836                 // promote paletted to BGRA, so we only have to worry about BGRA in the rest of this code
837                 Image_Copy8bitBGRA(prevbuffer, colorconvertbuffer, fragwidth * fragheight * fragdepth * glt->sides, glt->palette);
838                 prevbuffer = colorconvertbuffer;
839         }
840
841         if ((glt->flags & (TEXF_MIPMAP | TEXF_PICMIP | GLTEXF_UPLOAD)) == 0 && glt->inputwidth == glt->tilewidth && glt->inputheight == glt->tileheight && glt->inputdepth == glt->tiledepth)
842         {
843                 // update a portion of the image
844                 switch(glt->texturetype)
845                 {
846                 case GLTEXTURETYPE_1D:
847                         qglTexSubImage1D(GL_TEXTURE_1D, 0, fragx, fragwidth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
848                         break;
849                 case GLTEXTURETYPE_2D:
850                         qglTexSubImage2D(GL_TEXTURE_2D, 0, fragx, fragy, fragwidth, fragheight, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
851                         break;
852                 case GLTEXTURETYPE_3D:
853                         qglTexSubImage3D(GL_TEXTURE_3D, 0, fragx, fragy, fragz, fragwidth, fragheight, fragdepth, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
854                         break;
855                 default:
856                         Host_Error("R_Upload: partial update of type other than 1D, 2D, or 3D");
857                         break;
858                 }
859         }
860         else
861         {
862                 if (fragx || fragy || fragz || glt->inputwidth != fragwidth || glt->inputheight != fragheight || glt->inputdepth != fragdepth)
863                         Host_Error("R_Upload: partial update not allowed on initial upload or in combination with PICMIP or MIPMAP\n");
864
865                 // upload the image for the first time
866                 glt->flags &= ~GLTEXF_UPLOAD;
867
868                 // cubemaps contain multiple images and thus get processed a bit differently
869                 if (glt->texturetype != GLTEXTURETYPE_CUBEMAP)
870                 {
871                         if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
872                         {
873                                 Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
874                                 prevbuffer = resizebuffer;
875                         }
876                         // picmip/max_size
877                         while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
878                         {
879                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
880                                 prevbuffer = resizebuffer;
881                         }
882                 }
883                 mip = 0;
884                 if (gl_support_texture_compression)
885                 {
886                         if (gl_texturecompression.integer >= 2)
887                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_NICEST);
888                         else
889                                 qglHint(GL_TEXTURE_COMPRESSION_HINT_ARB, GL_FASTEST);
890                         CHECKGLERROR
891                 }
892                 switch(glt->texturetype)
893                 {
894                 case GLTEXTURETYPE_1D:
895                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
896                         if (glt->flags & TEXF_MIPMAP)
897                         {
898                                 while (width > 1 || height > 1 || depth > 1)
899                                 {
900                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
901                                         prevbuffer = resizebuffer;
902                                         qglTexImage1D(GL_TEXTURE_1D, mip++, glt->glinternalformat, width, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
903                                 }
904                         }
905                         break;
906                 case GLTEXTURETYPE_2D:
907                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
908                         if (glt->flags & TEXF_MIPMAP)
909                         {
910                                 while (width > 1 || height > 1 || depth > 1)
911                                 {
912                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
913                                         prevbuffer = resizebuffer;
914                                         qglTexImage2D(GL_TEXTURE_2D, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
915                                 }
916                         }
917                         break;
918                 case GLTEXTURETYPE_3D:
919                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
920                         if (glt->flags & TEXF_MIPMAP)
921                         {
922                                 while (width > 1 || height > 1 || depth > 1)
923                                 {
924                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
925                                         prevbuffer = resizebuffer;
926                                         qglTexImage3D(GL_TEXTURE_3D, mip++, glt->glinternalformat, width, height, depth, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
927                                 }
928                         }
929                         break;
930                 case GLTEXTURETYPE_CUBEMAP:
931                         // convert and upload each side in turn,
932                         // from a continuous block of input texels
933                         texturebuffer = (unsigned char *)prevbuffer;
934                         for (i = 0;i < 6;i++)
935                         {
936                                 prevbuffer = texturebuffer;
937                                 texturebuffer += glt->inputwidth * glt->inputheight * glt->inputdepth * glt->textype->inputbytesperpixel;
938                                 if (glt->inputwidth != width || glt->inputheight != height || glt->inputdepth != depth)
939                                 {
940                                         Image_Resample32(prevbuffer, glt->inputwidth, glt->inputheight, glt->inputdepth, resizebuffer, width, height, depth, r_lerpimages.integer);
941                                         prevbuffer = resizebuffer;
942                                 }
943                                 // picmip/max_size
944                                 while (width > glt->tilewidth || height > glt->tileheight || depth > glt->tiledepth)
945                                 {
946                                         Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, glt->tilewidth, glt->tileheight, glt->tiledepth);
947                                         prevbuffer = resizebuffer;
948                                 }
949                                 mip = 0;
950                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
951                                 if (glt->flags & TEXF_MIPMAP)
952                                 {
953                                         while (width > 1 || height > 1 || depth > 1)
954                                         {
955                                                 Image_MipReduce32(prevbuffer, resizebuffer, &width, &height, &depth, 1, 1, 1);
956                                                 prevbuffer = resizebuffer;
957                                                 qglTexImage2D(cubemapside[i], mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, prevbuffer);CHECKGLERROR
958                                         }
959                                 }
960                         }
961                         break;
962                 case GLTEXTURETYPE_RECTANGLE:
963                         qglTexImage2D(GL_TEXTURE_RECTANGLE_ARB, mip++, glt->glinternalformat, width, height, 0, glt->glformat, glt->gltype, NULL);CHECKGLERROR
964                         break;
965                 }
966                 GL_SetupTextureParameters(glt->flags, glt->textype->textype, glt->texturetype);
967         }
968         qglBindTexture(gltexturetypeenums[glt->texturetype], oldbindtexnum);CHECKGLERROR
969 }
970
971 static void R_UploadTexture (gltexture_t *glt)
972 {
973         if (!(glt->flags & GLTEXF_UPLOAD))
974                 return;
975
976         CHECKGLERROR
977         qglGenTextures(1, (GLuint *)&glt->texnum);CHECKGLERROR
978         R_Upload(glt, glt->inputtexels, 0, 0, 0, glt->inputwidth, glt->inputheight, glt->inputdepth);
979         if (glt->inputtexels)
980         {
981                 Mem_Free(glt->inputtexels);
982                 glt->inputtexels = NULL;
983                 glt->flags |= GLTEXF_DESTROYED;
984         }
985         else if (glt->flags & GLTEXF_DESTROYED)
986                 Con_Printf("R_UploadTexture: Texture %s already uploaded and destroyed.  Can not upload original image again.  Uploaded blank texture.\n", glt->identifier);
987 }
988
989 static rtexture_t *R_SetupTexture(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, int sides, int flags, textype_t textype, int texturetype, const unsigned char *data, const unsigned int *palette)
990 {
991         int i, size;
992         gltexture_t *glt;
993         gltexturepool_t *pool = (gltexturepool_t *)rtexturepool;
994         textypeinfo_t *texinfo;
995
996         if (cls.state == ca_dedicated)
997                 return NULL;
998
999         if (texturetype == GLTEXTURETYPE_RECTANGLE && !gl_texturerectangle)
1000         {
1001                 Con_Printf ("R_LoadTexture: rectangle texture not supported by driver\n");
1002                 return NULL;
1003         }
1004         if (texturetype == GLTEXTURETYPE_CUBEMAP && !gl_texturecubemap)
1005         {
1006                 Con_Printf ("R_LoadTexture: cubemap texture not supported by driver\n");
1007                 return NULL;
1008         }
1009         if (texturetype == GLTEXTURETYPE_3D && !gl_texture3d)
1010         {
1011                 Con_Printf ("R_LoadTexture: 3d texture not supported by driver\n");
1012                 return NULL;
1013         }
1014
1015         texinfo = R_GetTexTypeInfo(textype, flags);
1016         size = width * height * depth * sides * texinfo->inputbytesperpixel;
1017         if (size < 1)
1018         {
1019                 Con_Printf ("R_LoadTexture: bogus texture size (%dx%dx%dx%dbppx%dsides = %d bytes)\n", width, height, depth, texinfo->inputbytesperpixel * 8, sides, size);
1020                 return NULL;
1021         }
1022
1023         // clear the alpha flag if the texture has no transparent pixels
1024         switch(textype)
1025         {
1026         case TEXTYPE_PALETTE:
1027                 if (flags & TEXF_ALPHA)
1028                 {
1029                         flags &= ~TEXF_ALPHA;
1030                         if (data)
1031                         {
1032                                 for (i = 0;i < size;i++)
1033                                 {
1034                                         if (((unsigned char *)&palette[data[i]])[3] < 255)
1035                                         {
1036                                                 flags |= TEXF_ALPHA;
1037                                                 break;
1038                                         }
1039                                 }
1040                         }
1041                 }
1042                 break;
1043         case TEXTYPE_RGBA:
1044         case TEXTYPE_BGRA:
1045                 if (flags & TEXF_ALPHA)
1046                 {
1047                         flags &= ~TEXF_ALPHA;
1048                         if (data)
1049                         {
1050                                 for (i = 3;i < size;i += 4)
1051                                 {
1052                                         if (data[i] < 255)
1053                                         {
1054                                                 flags |= TEXF_ALPHA;
1055                                                 break;
1056                                         }
1057                                 }
1058                         }
1059                 }
1060                 break;
1061         case TEXTYPE_SHADOWMAP:
1062                 break;
1063         default:
1064                 Host_Error("R_LoadTexture: unknown texture type");
1065         }
1066
1067         glt = (gltexture_t *)Mem_Alloc(texturemempool, sizeof(gltexture_t));
1068         if (identifier)
1069                 strlcpy (glt->identifier, identifier, sizeof(glt->identifier));
1070         glt->pool = pool;
1071         glt->chain = pool->gltchain;
1072         pool->gltchain = glt;
1073         glt->inputwidth = width;
1074         glt->inputheight = height;
1075         glt->inputdepth = depth;
1076         glt->flags = flags | GLTEXF_UPLOAD;
1077         glt->textype = texinfo;
1078         glt->texturetype = texturetype;
1079         glt->inputdatasize = size;
1080         glt->palette = palette;
1081         glt->glinternalformat = texinfo->glinternalformat;
1082         glt->glformat = texinfo->glformat;
1083         glt->gltype = texinfo->gltype;
1084         glt->bytesperpixel = texinfo->internalbytesperpixel;
1085         glt->sides = glt->texturetype == GLTEXTURETYPE_CUBEMAP ? 6 : 1;
1086         glt->texnum = 0;
1087         // init the dynamic texture attributes, too [11/22/2007 Black]
1088         glt->dirtytexnum = 0;
1089         glt->updatecallback = NULL;
1090         glt->updatacallback_data = NULL;
1091
1092         if (data)
1093         {
1094                 glt->inputtexels = (unsigned char *)Mem_Alloc(texturemempool, size);
1095                 memcpy(glt->inputtexels, data, size);
1096         }
1097         else
1098                 glt->inputtexels = NULL;
1099
1100         GL_Texture_CalcImageSize(glt->texturetype, glt->flags, glt->inputwidth, glt->inputheight, glt->inputdepth, &glt->tilewidth, &glt->tileheight, &glt->tiledepth);
1101         R_PrecacheTexture(glt);
1102
1103         // texture converting and uploading can take a while, so make sure we're sending keepalives
1104         CL_KeepaliveMessage(false);
1105
1106         return (rtexture_t *)glt;
1107 }
1108
1109 rtexture_t *R_LoadTexture1D(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1110 {
1111         return R_SetupTexture(rtexturepool, identifier, width, 1, 1, 1, flags, textype, GLTEXTURETYPE_1D, data, palette);
1112 }
1113
1114 rtexture_t *R_LoadTexture2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1115 {
1116         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, flags, textype, GLTEXTURETYPE_2D, data, palette);
1117 }
1118
1119 rtexture_t *R_LoadTexture3D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height, int depth, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1120 {
1121         return R_SetupTexture(rtexturepool, identifier, width, height, depth, 1, flags, textype, GLTEXTURETYPE_3D, data, palette);
1122 }
1123
1124 rtexture_t *R_LoadTextureCubeMap(rtexturepool_t *rtexturepool, const char *identifier, int width, const unsigned char *data, textype_t textype, int flags, const unsigned int *palette)
1125 {
1126         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, flags, textype, GLTEXTURETYPE_CUBEMAP, data, palette);
1127 }
1128
1129 rtexture_t *R_LoadTextureShadowMapRectangle(rtexturepool_t *rtexturepool, const char *identifier, int width, int height)
1130 {
1131         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, TEXF_ALWAYSPRECACHE | TEXF_FORCENEAREST | TEXF_CLAMP, TEXTYPE_SHADOWMAP, GLTEXTURETYPE_RECTANGLE, NULL, NULL);
1132 }
1133
1134 rtexture_t *R_LoadTextureShadowMapCube(rtexturepool_t *rtexturepool, const char *identifier, int width)
1135 {
1136         return R_SetupTexture(rtexturepool, identifier, width, width, 1, 6, TEXF_ALWAYSPRECACHE | TEXF_FORCELINEAR | TEXF_CLAMP, TEXTYPE_SHADOWMAP, GLTEXTURETYPE_CUBEMAP, NULL, NULL);
1137 }
1138
1139 rtexture_t *R_LoadTextureShadowMap2D(rtexturepool_t *rtexturepool, const char *identifier, int width, int height)
1140 {
1141         return R_SetupTexture(rtexturepool, identifier, width, height, 1, 1, TEXF_ALWAYSPRECACHE | TEXF_FORCENEAREST | TEXF_CLAMP, TEXTYPE_SHADOWMAP, GLTEXTURETYPE_2D, NULL, NULL);
1142 }
1143
1144 rtexture_t *R_LoadTextureCubeProjection(rtexturepool_t *rtexturepool, const char *identifier)
1145 {
1146         return R_SetupTexture(rtexturepool, identifier, 2, 2, 1, 6, TEXF_ALWAYSPRECACHE | TEXF_FORCELINEAR | TEXF_CLAMP, TEXTYPE_BGRA, GLTEXTURETYPE_CUBEMAP, NULL, NULL);
1147 }
1148
1149 int R_TextureHasAlpha(rtexture_t *rt)
1150 {
1151         return rt ? (((gltexture_t *)rt)->flags & TEXF_ALPHA) != 0 : false;
1152 }
1153
1154 int R_TextureWidth(rtexture_t *rt)
1155 {
1156         return rt ? ((gltexture_t *)rt)->inputwidth : 0;
1157 }
1158
1159 int R_TextureHeight(rtexture_t *rt)
1160 {
1161         return rt ? ((gltexture_t *)rt)->inputheight : 0;
1162 }
1163
1164 void R_UpdateTexture(rtexture_t *rt, const unsigned char *data, int x, int y, int width, int height)
1165 {
1166         gltexture_t *glt;
1167         if (rt == NULL)
1168                 Host_Error("R_UpdateTexture: no texture supplied");
1169         if (data == NULL)
1170                 Host_Error("R_UpdateTexture: no data supplied");
1171         glt = (gltexture_t *)rt;
1172
1173         // we need it to be uploaded before we can update a part of it
1174         if (glt->flags & GLTEXF_UPLOAD)
1175                 R_UploadTexture(glt);
1176
1177         // update part of the texture
1178         R_Upload(glt, data, x, y, 0, width, height, 1);
1179 }
1180
1181 void R_ClearTexture (rtexture_t *rt)
1182 {
1183         gltexture_t *glt = (gltexture_t *)rt;
1184
1185         R_Upload( glt, NULL, 0, 0, 0, glt->tilewidth, glt->tileheight, glt->tiledepth );
1186 }